Paradoxical coffee-stain effect driven by the Marangoni flow observed on oil-infused surfaces

被引：13

作者：

Chaniel, Gilad ^{[1
]}

Frenkel, Mark ^{[2
]}

Multanen, Victor ^{[2
]}

Bormashenko, Edward ^{[2
]}

机构：

[1] Ariel Univ, Fac Nat Sci, Dept Phys, POB 3, IL-407000 Ariel, Israel

[2] Ariel Univ, Fac Engn, Chem Engn & Biotechnol Dept, POB 3, IL-407000 Ariel, Israel

来源：

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2017年 / 522卷

关键词：

Coffee-stain deposit; Marangoni flow; Oil-impregnated substrate; Evaporation; Contact line; TRIPLE LINE; WATER; SUPPRESSION; EVAPORATION; DROPS; HYSTERESIS; DEPOSITION; DYNAMICS; DROPLETS; TENSION;

D O I：

10.1016/j.colsurfa.2017.03.009

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Formation of coffee stain deposits under evaporation of droplets containing aqueous solution of salts placed on silicone-oil impregnated porous substrates was observed. The formation of ring-like deposits was registered for various molar concentrations of salts for the droplets of 5-300 mu l in volume. The effect occurred when the contact line was de-pinned, and the evaporation from the edge of a droplet was stopped by the silicone oil. The formation of the coffee stain deposit is related to the soluto-capillary Marangoni flow; the influence of the thermo-capillary flow taking place in parallel is negligible. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：355 / 360

页数：6

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